root/tags/1.3/wp-admin/import/mt.php

<?php

class MT_Import {

    var $posts = array ();
    var $file;
    var $id;
    var $mtnames = array ();
    var $newauthornames = array ();
    var $j = -1;

    function header() {
        echo '<div class="wrap">';
        echo '<h2>'.__('Import Movable Type or TypePad').'</h2>';
    }

    function footer() {
        echo '</div>';
    }

    function greet() {
        $this->header();
?>
<div class="narrow">
<p><?php _e('Howdy! We&#8217;re about to begin importing all of your Movable Type or Typepad entries into WordPress. To begin, either choose a file to upload and click "Upload file and import," or use FTP to upload your MT export file as <code>mt-export.txt</code> in your <code>/wp-content/</code> directory and then click "Import mt-export.txt"'); ?></p>
<?php wp_import_upload_form( add_query_arg('step', 1) ); ?>
    <p><?php _e('The importer is smart enough not to import duplicates, so you can run this multiple times without worry if&#8212;for whatever reason&#8212;it doesn\'t finish. If you get an <strong>out of memory</strong> error try splitting up the import file into pieces.'); ?> </p>
</div>
<?php
        $this->footer();
    }

    function users_form($n) {
        global $wpdb, $testing;
        $users = get_users_of_blog($wpdb->blogid);
?><select name="userselect[<?php echo $n; ?>]">
    <option value="#NONE#"><?php _e('- Select -') ?></option>
    <?php


        foreach ($users as $user) {
            echo '<option value="'.$user->user_login.'">'.$user->user_login.'</option>';
        }
?>
    </select>
    <?php


    }

    //function to check the authorname and do the mapping
    function checkauthor($author) {
        global $wpdb;
        //mtnames is an array with the names in the mt import file
        $key = array_search($author, $this->mtnames); //find the array key for $author in the $mtnames array
        $user_id = username_exists($this->newauthornames[$key]); //use that key to get the value of the author's name from $newauthornames

        return $user_id;
    }

    function get_mt_authors() {
        $temp = array();
        $authors = array();

        $handle = fopen($this->file, 'r');
        if ( $handle == null )
            return false;

        $in_comment = false;
        while ( $line = fgets($handle) ) {
            $line = trim($line);

            if ( 'COMMENT:' == $line )
                $in_comment = true;
            else if ( '-----' == $line )
                $in_comment = false;

            if ( $in_comment || 0 !== strpos($line,"AUTHOR:") )
                continue;

            $temp[] = trim( substr($line, strlen("AUTHOR:")) );
        }

        //we need to find unique values of author names, while preserving the order, so this function emulates the unique_value(); php function, without the sorting.
        $authors[0] = array_shift($temp);
        $y = count($temp) + 1;
        for ($x = 1; $x < $y; $x ++) {
            $next = array_shift($temp);
            if (!(in_array($next, $authors)))
                array_push($authors, "$next");
        }

        fclose($handle);

        return $authors;
    }

    function get_authors_from_post() {
        $formnames = array ();
        $selectnames = array ();

        foreach ($_POST['user'] as $key => $line) {
            $newname = trim(stripslashes($line));
            if ($newname == '')
                $newname = 'left_blank'; //passing author names from step 1 to step 2 is accomplished by using POST. left_blank denotes an empty entry in the form.
            array_push($formnames, "$newname");
        } // $formnames is the array with the form entered names

        foreach ($_POST['userselect'] as $user => $key) {
            $selected = trim(stripslashes($key));
            array_push($selectnames, "$selected");
        }

        $count = count($formnames);
        for ($i = 0; $i < $count; $i ++) {
            if ($selectnames[$i] != '#NONE#') { //if no name was selected from the select menu, use the name entered in the form
                array_push($this->newauthornames, "$selectnames[$i]");
            } else {
                array_push($this->newauthornames, "$formnames[$i]");
            }
        }
    }

    function mt_authors_form() {
?>
<div class="wrap">
<h2><?php _e('Assign Authors'); ?></h2>
<p><?php _e('To make it easier for you to edit and save the imported posts and drafts, you may want to change the name of the author of the posts. For example, you may want to import all the entries as admin\'s entries.'); ?></p>
<p><?php _e('Below, you can see the names of the authors of the MovableType posts in <i>italics</i>. For each of these names, you can either pick an author in your WordPress installation from the menu, or enter a name for the author in the textbox.'); ?></p>
<p><?php _e('If a new user is created by WordPress, the password will be set, by default, to "changeme". Quite suggestive, eh? ;)'); ?></p>
    <?php


        $authors = $this->get_mt_authors();
        echo '<ol id="authors">';
        echo '<form action="?import=mt&amp;step=2&amp;id=' . $this->id . '" method="post">';
        wp_nonce_field('import-mt');
        $j = -1;
        foreach ($authors as $author) {
            ++ $j;
            echo '<li>'.__('Current author:').' <strong>'.$author.'</strong><br />'.'<input type="text" value="'.$author.'" name="'.'user[]'.'" maxlength="30">';
            $this->users_form($j);
            echo '</li>';
        }

        echo '<input type="submit" value="'.__('Submit').'">'.'<br />';
        echo '</form>';
        echo '</ol></div>';

    }

    function select_authors() {
        $file = wp_import_handle_upload();
        if ( isset($file['error']) ) {
            $this->header();
            echo '<p>'.__('Sorry, there has been an error').'.</p>';
            echo '<p><strong>' . $file['error'] . '</strong></p>';
            $this->footer();
            return;
        }
        $this->file = $file['file'];
        $this->id = (int) $file['id'];

        $this->mt_authors_form();
    }

    function save_post(&$post, &$comments, &$pings) {
        // Reset the counter
        set_time_limit(30);
        $post = get_object_vars($post);
        $post = add_magic_quotes($post);
        $post = (object) $post;

        if ( $post_id = post_exists($post->post_title, '', $post->post_date) ) {
            echo '<li>';
            printf(__('Post <i>%s</i> already exists.'), stripslashes($post->post_title));
        } else {
            echo '<li>';
            printf(__('Importing post <i>%s</i>...'), stripslashes($post->post_title));

            if ( '' != trim( $post->extended ) )
                    $post->post_content .= "\n<!--more-->\n$post->extended";

            $post->post_author = $this->checkauthor($post->post_author); //just so that if a post already exists, new users are not created by checkauthor
            $post_id = wp_insert_post($post);
            if ( is_wp_error( $post_id ) ) 
                return $post_id;

            // Add categories.
            if ( 0 != count($post->categories) ) {
                wp_create_categories($post->categories, $post_id);
            }
        }

        $num_comments = 0;
        foreach ( $comments as $comment ) {
            $comment = get_object_vars($comment);
            $comment = add_magic_quotes($comment);

            if ( !comment_exists($comment['comment_author'], $comment['comment_date'])) {
                $comment['comment_post_ID'] = $post_id;
                $comment = wp_filter_comment($comment);
                wp_insert_comment($comment);
                $num_comments++;
            }
        }

        if ( $num_comments )
            printf(' '.__('(%s comments)'), $num_comments);

        $num_pings = 0;
        foreach ( $pings as $ping ) {
            $ping = get_object_vars($ping);
            $ping = add_magic_quotes($ping);

            if ( !comment_exists($ping['comment_author'], $ping['comment_date'])) {
                $ping['comment_content'] = "<strong>{$ping['title']}</strong>\n\n{$ping['comment_content']}";
                $ping['comment_post_ID'] = $post_id;
                $ping = wp_filter_comment($ping);
                wp_insert_comment($ping);
                $num_pings++;
            }
        }

        if ( $num_pings )
            printf(' '.__('(%s pings)'), $num_pings);

        echo "</li>";
        //ob_flush();flush();
    }

    function process_posts() {
        global $wpdb;

        $handle = fopen($this->file, 'r');
        if ( $handle == null )
            return false;

        $context = '';
        $post = new StdClass();
        $comment = new StdClass();
        $comments = array();
        $ping = new StdClass();
        $pings = array();

        echo "<div class='wrap'><ol>";

        while ( $line = fgets($handle) ) {
            $line = trim($line);

            if ( '-----' == $line ) {
                // Finishing a multi-line field
                if ( 'comment' == $context ) {
                    $comments[] = $comment;
                    $comment = new StdClass();
                } else if ( 'ping' == $context ) {
                    $pings[] = $ping;
                    $ping = new StdClass();
                }
                $context = '';
            } else if ( '--------' == $line ) {
                // Finishing a post.
                $context = '';
                $result = $this->save_post($post, $comments, $pings);
                if ( is_wp_error( $result ) ) 
                    return $result;
                $post = new StdClass;
                $comment = new StdClass();
                $ping = new StdClass();
                $comments = array();
                $pings = array();
            } else if ( 'BODY:' == $line ) {
                $context = 'body';
            } else if ( 'EXTENDED BODY:' == $line ) {
                $context = 'extended';
            } else if ( 'EXCERPT:' == $line ) {
                $context = 'excerpt';
            } else if ( 'KEYWORDS:' == $line ) {
                $context = 'keywords';
            } else if ( 'COMMENT:' == $line ) {
                $context = 'comment';
            } else if ( 'PING:' == $line ) {
                $context = 'ping';
            } else if ( 0 === strpos($line, "AUTHOR:") ) {
                $author = trim( substr($line, strlen("AUTHOR:")) );
                if ( '' == $context )
                    $post->post_author = $author;
                else if ( 'comment' == $context )
                     $comment->comment_author = $author;
            } else if ( 0 === strpos($line, "TITLE:") ) {
                $title = trim( substr($line, strlen("TITLE:")) );
                if ( '' == $context )
                    $post->post_title = $title;
                else if ( 'ping' == $context )
                    $ping->title = $title;
            } else if ( 0 === strpos($line, "STATUS:") ) {
                $status = trim( substr($line, strlen("STATUS:")) );
                if ( empty($status) )
                    $status = 'publish';
                $post->post_status = $status;
            } else if ( 0 === strpos($line, "ALLOW COMMENTS:") ) {
                $allow = trim( substr($line, strlen("ALLOW COMMENTS:")) );
                if ( $allow == 1 )
                    $post->comment_status = 'open';
                else
                    $post->comment_status = 'closed';
            } else if ( 0 === strpos($line, "ALLOW PINGS:") ) {
                $allow = trim( substr($line, strlen("ALLOW PINGS:")) );
                if ( $allow == 1 )
                    $post->ping_status = 'open';
                else
                    $post->ping_status = 'closed';
            } else if ( 0 === strpos($line, "CATEGORY:") ) {
                $category = trim( substr($line, strlen("CATEGORY:")) );
                if ( '' != $category )
                    $post->categories[] = $category;
            } else if ( 0 === strpos($line, "PRIMARY CATEGORY:") ) {
                $category = trim( substr($line, strlen("PRIMARY CATEGORY:")) );
                if ( '' != $category )
                    $post->categories[] = $category;
            } else if ( 0 === strpos($line, "DATE:") ) {
                $date = trim( substr($line, strlen("DATE:")) );
                $date = strtotime($date);
                $date = date('Y-m-d H:i:s', $date);
                $date_gmt = get_gmt_from_date($date);
                if ( '' == $context ) {
                    $post->post_modified = $date;
                    $post->post_modified_gmt = $date_gmt;
                    $post->post_date = $date;
                    $post->post_date_gmt = $date_gmt;
                } else if ( 'comment' == $context ) {
                    $comment->comment_date = $date;
                } else if ( 'ping' == $context ) {
                    $ping->comment_date = $date;
                }
            } else if ( 0 === strpos($line, "EMAIL:") ) {
                $email = trim( substr($line, strlen("EMAIL:")) );
                if ( 'comment' == $context )
                    $comment->comment_author_email = $email;
                else
                    $ping->comment_author_email = '';
            } else if ( 0 === strpos($line, "IP:") ) {
                $ip = trim( substr($line, strlen("IP:")) );
                if ( 'comment' == $context )
                    $comment->comment_author_IP = $ip;
                else
                    $ping->comment_author_IP = $ip;
            } else if ( 0 === strpos($line, "URL:") ) {
                $url = trim( substr($line, strlen("URL:")) );
                if ( 'comment' == $context )
                    $comment->comment_author_url = $url;
                else
                    $ping->comment_author_url = $url;
            } else if ( 0 === strpos($line, "BLOG NAME:") ) {
                $blog = trim( substr($line, strlen("BLOG NAME:")) );
                $ping->comment_author = $blog;
            } else {
                // Processing multi-line field, check context.

                $line .= "\n";
                if ( 'body' == $context ) {
                    $post->post_content .= $line;
                } else if ( 'extended' ==  $context ) {
                    $post->extended .= $line;
                } else if ( 'excerpt' == $context ) {
                    $post->post_excerpt .= $line;
                } else if ( 'comment' == $context ) {
                    $comment->comment_content .= $line;
                } else if ( 'ping' == $context ) {
                    $ping->comment_content .= $line;
                }
            }
        }

        echo '</ol>';

        wp_import_cleanup($this->id);
        do_action('import_done', 'mt');

        echo '<h3>'.sprintf(__('All done. <a href="%s">Have fun!</a>'), get_option('home')).'</h3></div>';
    }

    function import() {
        $this->id = (int) $_GET['id'];

        $this->file = get_attached_file($this->id);
        $this->get_authors_from_post();
        $result = $this->process_posts();
        if ( is_wp_error( $result ) ) 
            return $result;
    }

    function dispatch() {
        if (empty ($_GET['step']))
            $step = 0;
        else
            $step = (int) $_GET['step'];

        switch ($step) {
            case 0 :
                $this->greet();
                break;
            case 1 :
                check_admin_referer('import-upload');
                $this->select_authors();
                break;
            case 2:
                check_admin_referer('import-mt');
                $result = $this->import();
                if ( is_wp_error( $result ) )
                    echo $result->get_error_message();
                break;
        }
    }

    function MT_Import() {
        // Nothing.
    }
}

$mt_import = new MT_Import();

register_importer('mt', __('Movable Type and TypePad'), __('Import posts and comments from a Movable Type or Typepad blog'), array ($mt_import, 'dispatch'));
?>